University of Illinois Urbana-Champaign

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Showing 991–1020 of 1,813 items
Thumbnail for Petroleum industry in Illinois, 1970. Part I. Oil and Gas Developments
Petroleum industry in Illinois, 1970. Part I. Oil and Gas Developments
Illinois State Geological Survey; Van Den Berg, Jacob; Lawry, Thomas F.

Thumbnail for Fox Squirrels and Gray Squirrels in Illinois
Fox Squirrels and Gray Squirrels in Illinois
Brown, Louis G.; Yeager, Lee Emmett